A multi-signal synchronous cable for efficient energy transmission and a preparation method thereof

Abstract

The present invention discloses a multi-signal synchronous cable for efficient energy transmission and a preparation method thereof, the preparation method comprising opening a material stop valve, and feeding and filling a pressure-maintaining cavity with cable raw materials, and closing the material stop valve after the cable raw materials fill the pressure-maintaining cavity; exhausting the pressure-maintaining cavity, and pressing down the pressure-maintaining piston at the same time, so that the cavity height of the cable raw materials decreases; returning to execute the opening of the material stop valve, and feeding and filling the pressure-maintaining cavity with cable raw materials, and closing the material stop valve after the cable raw materials fill the pressure-maintaining cavity, and when the cavity height is level with the material stop valve, transferring the material storage device to the top of the extruder; pressing down the pressure-maintaining piston, and opening the discharge valve, so that the cable raw materials are injected into the extruder. With the cooperation of multiple feeding and exhausting operations, the air in the cable raw materials is fully removed, and at the same time, the filling of the cable raw materials is more sufficient, and the thickness distribution of the insulation layer is more stable, which can reduce the heating and voltage drop of the cable, thereby improving the energy transmission efficiency of the multi-signal synchronous cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable injection molding, and in particular to a multi-signal synchronous cable for efficient energy transmission and a preparation method thereof. Background Art

[0002] Cables are an indispensable infrastructure in modern industry and life, and are widely used in power transmission, communication signal transmission, data processing and other scenarios. The performance of cables directly affects the stability of equipment operation, energy utilization efficiency and signal transmission quality, especially in high-demand multi-signal synchronous cables, which not only need to achieve interference-free synchronous transmission of multiple signals, but also require efficient energy transmission, which puts higher requirements on cable material density, uniformity and insulation performance and other parameters.

[0003] At present, the insulation layer of the cable is mainly obtained through plastic molding methods such as extrusion molding and injection molding, which first melts and plasticizes the polymer material, and then forms it through the corresponding mold. At present, the existing plastic molding method relies on a screw extruder to shear and heat the polymer material. It needs to use a hopper to feed the polymer material into the extruder. Due to the natural filling of the raw materials under the action of gravity, the material filling is uneven, a large amount of air remains, and it is easy to form internal gaps or uneven molecular structures during subsequent heating and plasticization, which has an adverse effect on the electrical performance, signal transmission quality and structural stability of the cable. Especially in multi-signal transmission scenarios, it is difficult to meet the requirements of energy transmission efficiency.

[0004] In summary, a new preparation method needs to be developed to meet the requirements of multi-signal synchronous cables for energy transmission efficiency. Summary of the invention

[0005] The object of the present invention is to provide a multi-signal synchronous cable with efficient energy transmission and a preparation method thereof, so as to solve the technical problem that the energy transmission efficiency of the multi-signal synchronous cable is insufficient due to the plastic molding method in the prior art.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A method for preparing a multi-signal synchronous cable for efficient energy transmission, comprising:

[0008] A movable material storage device is provided, the material storage device comprises a pressure-maintaining chamber, a discharge valve is arranged below the pressure-maintaining chamber, a material-blocking valve is arranged on the side wall of the pressure-maintaining chamber, and a movable pressure-maintaining piston is arranged above the pressure-maintaining chamber;

[0009] Open the material stop valve, and put the cable material into the pressure holding chamber to fill it up. After the cable material fills up the pressure holding chamber, close the material stop valve.

[0010] The pressure-maintaining cavity is evacuated, and the pressure-maintaining piston is pressed downward to reduce the height of the cable material in the cavity;

[0011] Return to the step of opening the material stop valve, and add the cable raw material into the pressure holding chamber to fill it up. After the pressure holding chamber is filled up with the cable raw material, close the material stop valve, and when the height in the chamber is level with the material stop valve, move the material storage device to the top of the extruder.

[0012] The pressure-maintaining piston is pressed down and the discharge valve is opened to allow the cable raw material to be injected into the extruder.

[0013] Optionally, there are multiple material storage devices, and the multiple material storage devices are installed together on a turntable; the turntable is used to make one material storage device located above the extruder and make other material storage devices located at corresponding filling devices;

[0014] Before the material blocking valve is opened, the method further includes: transferring the material storage device to below the filling device through a rotating disk;

[0015] The step of transferring the material storage device to the top of the extruder comprises: transferring the material storage device to the top of the extruder via a rotating disk.

[0016] Optionally, the number of the material storage devices is two, one of the material storage devices is used to temporarily store polar cable raw materials, and the other of the material storage devices is used to temporarily store non-polar cable raw materials;

[0017] The filling device comprises a polar filling channel and a non-polar filling channel. The polar filling channel is used for inputting polar cable raw materials, and the non-polar filling channel is used for inputting non-polar cable raw materials.

[0018] Optionally, in the process of evacuating the pressure-maintaining cavity and pressing the pressure-maintaining piston downward to reduce the cavity height of the cable raw material, the preparation method further comprises:

[0019] Obtain the downward pressure spacing of the pressure-holding piston in the current downward pressure process, calculate the spacing difference d between the downward pressure spacing of the pressure-holding piston in the current downward pressure process and the downward pressure spacing of the pressure-holding piston in the previous downward pressure process, and calculate the discharge volume V1 according to the spacing difference d; obtain the downward pressure time t of the current downward pressure process;

[0020] Calculate the suction speed E according to the quotient of the discharge volume V1 and the pressure-down time t;

[0021] The pumping speed is compared with the preset qualified range. If the pumping speed is greater than the qualified range, the downward pressure speed of the pressure-maintaining piston is reduced; if the pumping speed is less than the qualified range, the downward pressure speed of the pressure-maintaining piston is increased.

[0022] Optionally, the step of injecting the cable raw material into the pressure-maintaining cavity and filling the cavity with the cable raw material may include:

[0023] Plasma surface treatment is performed on the cable raw materials to remove pollutants on the surface of the cable raw materials and introduce polar groups;

[0024] The cable raw materials are subjected to heat treatment and cooling cycle treatment, the heat treatment is a constant temperature heating treatment, and the cooling cycle treatment is a gradual cooling treatment;

[0025] Electrostatic separation is performed on cable raw materials to remove foreign matter and dust particles from the cable raw materials.

[0026] Optionally, the plasma surface treatment of the cable raw material comprises:

[0027] A first plasma gas is introduced into the plasma processing chamber, and the first plasma gas is excited by a high frequency power supply;

[0028] The cable raw material is fed into the plasma processing chamber and laid flat, and the preset excitation time is kept still;

[0029] Introducing an inert gas into the plasma processing chamber to flush out pollutants generated by the reaction of the first plasma gas and the cable raw material;

[0030] A second plasma gas is introduced into the plasma processing chamber to introduce polar groups into the cable raw material.

[0031] Optionally, the heat treatment and cooling cycle treatment of the cable raw material includes:

[0032] Put the cable raw material into the heating device, and heat the cable raw material at a constant temperature for a preset heating time. The constant temperature of the heating device is 200°C to 300°C, and the heating time is 1 to 3 hours;

[0033] The cable raw materials are transferred to a ventilation cooling room, and airflow with corresponding temperature is introduced into the cable raw materials to gradually cool down the cable raw materials. The temperature of the airflow is lower than that of the cable raw materials.

[0034] Optionally, the step of introducing an airflow having a corresponding temperature according to the cable raw material includes:

[0035] Get the temperature of the cable material;

[0036] When the temperature of the cable raw material is higher than 150° C., a first air flow is introduced;

[0037] When the temperature of the cable raw material is higher than 80° C. and lower than 150° C., a second air flow is introduced;

[0038] When the temperature of the cable material is lower than 80° C., a natural airflow is introduced; wherein the temperature of the first airflow is greater than the temperature of the second airflow, and the temperature of the second airflow is greater than the temperature of the natural airflow.

[0039] Optionally, the electrostatically sorting the cable raw materials includes:

[0040] The cable raw materials are fed into an electrostatic sorting device, and an electrostatic field is generated by the electrostatic sorting device;

[0041] According to the combination state of the cable raw materials and the polar groups, they are deflected to the corresponding collection area by the electrostatic sorting equipment to obtain non-polar cable raw materials and polar cable raw materials, and foreign matter and dust particles are screened out.

[0042] A multi-signal synchronous cable for efficient energy transmission comprises a conductor and an insulating layer wrapped around the conductor, wherein the insulating layer is made by the preparation method of the multi-signal synchronous cable as described above.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] The multi-signal synchronous cable for efficient energy transmission provided by the present invention and its preparation method realize multiple feeding, vacuuming and pressure maintenance through a material storage device, and then under the cooperation of multiple feeding and vacuuming operations, the air in the cable raw material is fully removed, and the filling of the cable raw material is more sufficient, avoiding the problem of internal gaps in the material caused by entrained gas. In addition, the tighter and more uniform cable raw material structure makes the insulation layer thickness distribution of the multi-signal synchronous cable more stable, thereby effectively reducing local power loss and improving the overall energy transmission efficiency. In particular, in high-power multi-signal synchronous transmission applications, it can significantly reduce cable heating and voltage drop, thereby improving the energy transmission efficiency of the multi-signal synchronous cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0046] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0047] Figure 1 It is a flow chart of a method for preparing a multi-signal synchronous cable for efficient energy transmission in this embodiment;

[0048] Figure 2 It is a schematic cross-sectional principle diagram of the material storage device and the extruder in this embodiment;

[0049] Illustrations: 100, extruder; 200, turntable; 300, material storage device; 301, pressure-maintaining chamber; 302, discharge valve; 303, material blocking valve; 400, air extraction pipe; 500, pressure-maintaining piston. DETAILED DESCRIPTION

[0050] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0052] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0053] Embodiment 1:

[0054] like Figure 1 As shown, this embodiment provides a method for preparing a multi-signal synchronous cable for efficient energy transmission, comprising:

[0055] S100, providing a movable material storage device 300, the material storage device 300 includes a pressure-maintaining chamber 301, a discharge valve 302 is arranged below the pressure-maintaining chamber 301, a material blocking valve 303 is arranged on the side wall of the pressure-maintaining chamber 301, and a movable pressure-maintaining piston 500 is arranged above the pressure-maintaining chamber 301; the specific material storage device 300 is as follows Figure 2 As shown;

[0056] The pressure-maintaining piston 500 includes but is not limited to a piston driven by a motor or a cylinder, which controls the movement of the piston by electric current or airflow. The discharge valve 302 and the stop valve 303 can use valve bodies such as ball valves and stop valves;

[0057] S200, opening the material stop valve 303, and adding and filling the pressure-maintaining chamber 301 with cable raw materials, and after the pressure-maintaining chamber 301 is filled with the cable raw materials, closing the material stop valve 303; in this step, the method of adding the cable raw materials is not limited, including but not limited to manual filling, filling by a filling device, etc.;

[0058] S300, the pressure-maintaining chamber 301 is evacuated, and at the same time, the pressure-maintaining piston 500 is pressed downward to reduce the height of the cable raw material in the chamber; the evacuation can be achieved by installing an evacuation pipe 400 on the pressure-maintaining piston 500, and the evacuation pipe 400 corresponds to an evacuation device connected to the outside; a diaphragm can be installed at the pipe mouth of the evacuation pipe 400 to separate the gas from the cable raw material;

[0059] S310, when the cavity height does not reach the material stop valve 303, return to open the material stop valve 303, and put the cable raw material into the pressure holding cavity 301 and fill it up, and after the cable raw material fills the pressure holding cavity 301, close the material stop valve 303; S320, when the cavity height is level with the material stop valve 303, transfer the material storage device 300 to the top of the extruder 100;

[0060] S400 , the pressure-maintaining piston 500 is pressed downward, and the discharge valve 302 is opened to inject the cable raw material into the extruder 100 .

[0061] Specifically, the method for preparing a multi-signal synchronous cable for efficient energy transmission in this embodiment realizes multiple feeding, air extraction and pressure maintenance through the material storage device 300, and then, with the cooperation of multiple feeding and air extraction operations, the air in the cable raw material is fully removed, and at the same time, the filling of the cable raw material is more sufficient, avoiding the problem of internal gaps in the material caused by entrained gas. In addition, the tighter and more uniform cable raw material structure makes the thickness distribution of the insulation layer of the multi-signal synchronous cable more stable, thereby effectively reducing local power loss and improving the overall energy transmission efficiency. Especially in high-power multi-signal synchronous transmission applications, it can significantly reduce cable heating and voltage drop, thereby improving the energy transmission efficiency of the multi-signal synchronous cable.

[0062] On the basis of the above-mentioned implementation, step S100: adding cable raw materials into the pressure-maintaining chamber 301 and filling it up, previously including:

[0063] S010, performing plasma surface treatment on the cable raw materials to remove pollutants on the surface of the cable raw materials and introduce polar groups;

[0064] S020, performing heat treatment and cooling cycle treatment on the cable raw materials, wherein the heat treatment is a constant temperature heating treatment, and the cooling cycle treatment is a gradual temperature reduction treatment;

[0065] S030. Electrostatically sort the cable raw materials to remove foreign matter and dust particles in the cable raw materials.

[0066] In addition, polar cable raw materials and non-polar cable raw materials can be screened through other density screening methods such as air separation.

[0067] Furthermore, step S010, performing plasma surface treatment on the cable raw material, comprises:

[0068] S011, introducing a first plasma gas into the plasma processing chamber, and exciting the first plasma gas by a high-frequency power supply;

[0069] In step S010, a plasma surface treatment device is mainly used. The plasma surface treatment device is well known to those skilled in the art and will not be described in detail in this embodiment. The main purpose is to provide a processing chamber for the cable raw material. Specifically, in step S011, the processing chamber is first evacuated to a state close to a low pressure (such as 0.01 to 0.05 MPa). Subsequently, a first plasma gas, argon or helium, is introduced to provide a stable plasma environment and generate high-energy particles. Next, a high-frequency power supply is used to excite the gas to form a plasma, so that the gas has sufficient energy to impact and react on the surface of the subsequent cable raw material.

[0070] S012, feeding and laying the cable raw material into the plasma processing chamber, and keeping it still for a preset excitation time;

[0071] In step S012, the cable raw material can be fed into the plasma surface treatment equipment through a conveyor belt, a tray or other structures, and left to stand for a preset excitation time, which can be selected from 3 minutes to 10 minutes, and is adjusted according to the characteristics of the cable raw material and the type of pollutants, and is not limited in this embodiment;

[0072] S013, introducing an inert gas into the plasma processing chamber to flush out pollutants generated by the reaction of the first plasma gas and the cable raw material;

[0073] In step S013, the cable raw material is flushed with an inert gas such as argon or nitrogen to remove volatile products and tiny particles generated by the plasma reaction, thereby preventing these impurities from adhering to the surface of the cable raw material again in subsequent processing;

[0074] S014. A second plasma gas is introduced into the plasma processing chamber to introduce polar groups into the cable raw material.

[0075] In step S014, by introducing a second plasma gas such as oxygen, ammonia or fluorinated gas, the active plasma is again excited to form under the action of a high-frequency power supply, so that polar groups can be introduced on the surface of the particles to enhance the wettability and adhesion of the cable raw materials. The activation time is set to 5 minutes to 15 minutes, which needs to be set to be greater than the excitation time.

[0076] Among them, the polar groups include but are not limited to hydroxyl, amino and carboxyl groups, preferably hydroxyl groups, which can improve the wettability of cable raw materials and promote the interfacial adhesion between the insulation layer and the conductor of the multi-signal synchronous cable, thereby reducing power loss, and correspondingly require the introduction of oxygen as the second plasma gas; the activation time is longer, which is conducive to the chemical bonding of the polar groups and avoids shedding or migration in subsequent processing.

[0077] Furthermore, step S020, heat treatment and cooling cycle treatment are performed on the cable raw material, including:

[0078] S021. Place the cable raw material in a heating device, and heat the cable raw material at a constant temperature for a preset heating time. The constant temperature of the heating device is 200° C. to 300° C., and the heating time is 1 to 3 hours.

[0079] The heating equipment includes but is not limited to an electric furnace, an infrared heating device, etc., which are well known to those skilled in the art and are not specifically limited in this embodiment. During the heating process, the polar groups are promoted to be stably attached to the molecular structure of the cable raw material in the form of chemical bonds.

[0080] S022. Transfer the cable raw material to a ventilation cooling chamber, and introduce airflow of corresponding temperature into the cable raw material to gradually cool the cable raw material, wherein the temperature of the airflow is lower than the temperature of the cable raw material. The ventilation cooling chamber is well known to those skilled in the art, and can be replaced by other conventional cooling equipment that can provide airflow of specified temperature without limitation.

[0081] Specifically, S022, introducing airflow of corresponding temperature according to the cable raw material, including:

[0082] S0221. Obtaining the temperature of the cable raw material;

[0083] S0222. When the temperature of the cable raw material is higher than 150° C., introducing the first airflow;

[0084] S0223. When the temperature of the cable raw material is higher than 80° C. and lower than 150° C., introducing a second airflow;

[0085] S0224. When the temperature of the cable material is lower than 80°C, natural airflow is introduced; wherein the temperature of the first airflow is greater than the temperature of the second airflow, and the temperature of the second airflow is greater than the temperature of the natural airflow; in addition, the temperature of the first airflow needs to be less than 150°C, and the temperature of the second airflow needs to be less than 80°C to ensure cooling efficiency.

[0086] Specifically, in step S021, the temperature is controlled at 200°C to 300°C, which provides activation energy for the chemical reaction of the polar groups, prompting the polar groups to form stable chemical bonds with the reaction sites in the cable raw materials, making the molecular structure of the cable raw materials more orderly, and improving the chemical stability and physical properties of the materials; at the same time, heat treatment can also relieve the residual stress inside the cable raw materials, improve the arrangement of the molecular chains, and provide a more uniform and stable material basis for subsequent processes.

[0087] In step S022, the problem of uneven thermal expansion and contraction of the material caused by sudden cooling is avoided by gradually cooling, thereby reducing the occurrence of microscopic cracks or deformations; at the same time, gradual cooling can prevent the polar groups from desorbing or loosely binding due to rapid cooling, ensuring that the polar groups are evenly distributed on the surface and inside of the material, optimizing its charge distribution characteristics.

[0088] On the basis of the above-mentioned implementation mode, step S030, electrostatically sorting the cable raw materials, comprises:

[0089] S031. Feeding the cable raw material into an electrostatic sorting device, and generating an electrostatic field through the electrostatic sorting device;

[0090] S302, according to the combination state of the cable raw materials and the polar groups, the cable raw materials are deflected to the corresponding collection area by the electrostatic sorting equipment to obtain non-polar cable raw materials and polar cable raw materials, and foreign matter and dust particles are screened out.

[0091] Step S030, electrostatically sorting the cable raw materials, including:

[0092] S031. Feeding the cable raw material into an electrostatic sorting device, and generating an electrostatic field through the electrostatic sorting device;

[0093] Among them, the electrostatic separation equipment is well known to those skilled in the art and will not be specifically introduced in this embodiment. It can generate an electrostatic field through a voltage of 20KV~30KV;

[0094] S302. According to the binding state of the cable raw materials and the polar groups, the cable raw materials are deflected to the corresponding collection area by the electrostatic sorting equipment to obtain non-polar cable raw materials and polar cable raw materials, and foreign matter and dust particles are screened out. For polar cable raw materials, due to the introduction of polar groups, their deflection amplitude in the electrostatic field is larger, which is convenient for being guided to the corresponding polar collection area; for foreign matter and dust particles, they usually move in a straight line due to the insufficient electric field force during the sorting process, which is convenient for screening out to an independent waste collection area; then, for non-polar cable raw materials, they are between polar cable raw materials and "foreign matter and dust particles", and can achieve slight deflection, thereby screening out non-polar cable raw materials (without polar groups).

[0095] In the subsequent step S100 , polar cable raw materials can be put into the first stocking device 300 , non-polar cable raw materials can be put into the second stocking device 300 , and so on, so as to alternately inject polar cable raw materials and non-polar cable raw materials into the extruder 100 .

[0096] It should be pointed out that polar cable raw materials have strong interfacial bonding ability due to the permanent electric dipole moment inside or on the surface of the polar group molecules they contain, while non-polar cable raw materials lack obvious charge distribution inside the molecules, showing weak interfacial interaction; under the alternating injection in the above steps, polar and non-polar materials form alternating "hard-soft" interaction zones in the microstructure, the hard phase (polar material) transfers stress, and the soft phase (non-polar material) relieves stress concentration, thereby achieving synergistic optimization of mechanical properties, and the formed layered structure can limit the overall expansion of the material under high temperature environment, avoiding cracking or stratification problems caused by differences in thermal expansion coefficients. In addition, under the action of the extruder 100, polar cable raw materials and non-polar cable raw materials are alternately injected, and between the two phase surfaces, the screw shear force of the extruder 100 can make the two materials interpenetrate and cross-link at the molecular level to form a more uniform composite material, thereby improving energy transmission efficiency.

[0097] On the basis of the above-mentioned embodiment, the number of the material storage devices 300 is multiple, and the multiple material storage devices 300 are installed together on a turntable 200; the turntable 200 is used to make one material storage device 300 located above the extruder 100, and make other material storage devices 300 located at the corresponding filling devices; it is understandable that the turntable 200 can be selected by a motor or a cylinder, so as to drive the material storage device 300 to move to the top of the extruder after being filled by multiple filling devices, and inject the cable raw material into the extruder; at the same time, the turntable can also be lifted and lowered by another motor with a lifting structure to meet the requirements of spatial movement; the filling device includes but is not limited to a gravity flow chute, a silo with a discharge pipe, and other structures, which can cut off the cable raw material according to requirements, or pour the cable raw material into the hopper of the material storage device 300, and then enter the pressure holding chamber 301 through the material blocking valve 303;

[0098] Before opening the material blocking valve 303, the method further includes: transferring the material storage device 300 to below the filling device through the rotating disk 200;

[0099] The step of transferring the material storage device 300 to the top of the extruder 100 includes: transferring the material storage device 300 to the top of the extruder 100 via the turntable 200 .

[0100] As a preferred embodiment, the number of the storage devices 300 is two, one storage device 300 is used to temporarily store polar cable raw materials, which are derived from pre-treated cable raw materials, and the other storage device 300 is used to temporarily store non-polar cable raw materials, which are derived from unpre-treated cable raw materials, and non-polar cable raw materials that have been pre-treated but screened can be optionally added to improve material utilization; the filling device includes a polar filling channel and a non-polar filling channel, the polar filling channel is used to input polar cable raw materials, and the non-polar filling channel is used to input non-polar cable raw materials.

[0101] Exemplarily, for the storage device 300, the preparation method thereof includes:

[0102] S501, moving a material storage device 300 to a filling device via a rotating disk 200;

[0103] S502, opening the material blocking valve 303, and adding and filling the pressure-maintaining chamber 301 with cable raw materials, and after the pressure-maintaining chamber 301 is filled with the cable raw materials, closing the material blocking valve 303; the cable raw materials are polar cable raw materials;

[0104] S503, evacuating the pressure-maintaining chamber 301, and at the same time pressing the pressure-maintaining piston 500 downward to reduce the height of the cable raw material in the chamber;

[0105] S504, return to execute to open the material stop valve 303, and put the cable raw material into the pressure holding chamber 301 and fill it up, and after the cable raw material fills the pressure holding chamber 301, close the material stop valve 303; S505, and when the height in the chamber is level with the material stop valve 303, move one material storage device 300 to the top of the extruder 100 through the turntable 200, and move the other material storage device 300 to the filling device;

[0106] S506, the pressure-maintaining piston 500 of one material storage device 300 is pressed down, and the discharge valve 302 is opened to inject the cable raw material into the extruder 100; at the same time, the other material storage device 300 is returned to execute the opening of the material stop valve 303, and the cable raw material is a non-polar cable raw material;

[0107] One material storage device 300 is used to store polar cable materials, and the other material storage device 300 is used to store non-polar cable materials.

[0108] It can be understood that in actual operation, the filling device is divided into two dedicated channels, polar and non-polar, which can respectively process cable raw materials of different properties, thereby avoiding cross contamination or mixing errors, thereby improving the subsequent compaction effect, and alternately injecting polar cable raw materials and non-polar cable raw materials into the extruder 100.

[0109] Furthermore, in step S300, in which the pressure-maintaining chamber 301 is evacuated and the pressure-maintaining piston 500 is pressed downward to reduce the height of the cable raw material in the chamber, the preparation method further includes:

[0110] S301, obtaining the pressing distance of the pressure-maintaining piston 500 in the current pressing process, calculating the distance difference d between the pressing distance of the pressure-maintaining piston 500 in the current pressing process and the pressing distance of the pressure-maintaining piston 500 in the previous pressing process, and calculating the discharge volume V1 according to the distance difference d; obtaining the pressing time t of the current pressing process;

[0111] S302, calculating the exhaust speed E according to the quotient of the discharge volume V1 and the pressure-down time t;

[0112] S303, comparing the air pumping speed with a preset qualified range, if the air pumping speed is greater than the qualified range, reducing the downward pressing speed of the pressure-maintaining piston 500; if the air pumping speed is less than the qualified range, increasing the downward pressing speed of the pressure-maintaining piston 500.

[0113] The preset qualified range is 20 cm 3 / s~70 cm 3 / s, the qualified range can be measured by empirical methods and historical experimental data, and those skilled in the art can make adjustments within this range; wherein, by calculating the actual air extraction speed and comparing it with the preset qualified range, the downward pressing speed of the pressure-maintaining piston 500 can be dynamically adjusted. This ensures that the gas can be exhausted at the most efficient speed throughout the process, while maintaining the same compaction density of the raw materials, thereby ensuring the stability of the produced cable materials in terms of mechanical properties, electrical properties, etc.

[0114] Embodiment 2:

[0115] This embodiment also provides a multi-signal synchronous cable for efficient energy transmission, including a conductor and an insulating layer wrapped around the conductor, and the insulating layer is made using the preparation method of the multi-signal synchronous cable for efficient energy transmission of the above-mentioned embodiment 1.

[0116] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a multi-signal synchronous cable for efficient energy transmission, characterized in that: include: Two movable material storage devices and a filling device are provided, one material storage device is used for temporarily storing polar cable raw materials, and the other material storage device is used for temporarily storing non-polar cable raw materials, and the two material storage devices are used to alternately inject polar cable raw materials and non-polar cable raw materials into the extruder; the material storage device includes a pressure-maintaining chamber, a discharge valve is arranged below the pressure-maintaining chamber, a material blocking valve is arranged on the side wall of the pressure-maintaining chamber, and a movable pressure-maintaining piston is arranged above the pressure-maintaining chamber; the filling device includes a polar filling channel and a non-polar filling channel, the polar filling channel is used to put in polar cable raw materials, and the non-polar filling channel is used to put in non-polar cable raw materials; Open the material stop valve, and put the cable material into the pressure holding chamber to fill it up. After the cable material fills up the pressure holding chamber, close the material stop valve. The pressure-maintaining cavity is evacuated, and the pressure-maintaining piston is pressed downward to reduce the height of the cable material in the cavity; Return to the step of opening the material stop valve, and add the cable raw material into the pressure holding chamber to fill it up. After the pressure holding chamber is filled up with the cable raw material, close the material stop valve, and when the height in the chamber is level with the material stop valve, move the material storage device to the top of the extruder. Press the pressure-maintaining piston downward and open the discharge valve to allow the cable raw material to be injected into the extruder; The step of injecting the cable raw material into the pressure-maintaining cavity and filling the cavity with the cable raw material comprises: Plasma surface treatment is performed on the cable raw materials to remove pollutants on the surface of the cable raw materials and introduce polar groups; The cable raw materials are electrostatically sorted to remove foreign matter and dust particles in the cable raw materials, and non-polar cable raw materials and polar cable raw materials are obtained.

2. The method for preparing a multi-signal synchronous cable for efficient energy transmission according to claim 1, characterized in that: Before the material blocking valve is opened, the method further includes: transferring the material storage device to below the filling device through a rotating disk; The step of transferring the material storage device to the top of the extruder comprises: transferring the material storage device to the top of the extruder via a rotating disk.

3. The method for preparing a multi-signal synchronous cable for efficient energy transmission according to claim 2, characterized in that: The two material storage devices are installed together on a turntable; the turntable is used to make one of the material storage devices located above the extruder and the other material storage devices located on the corresponding filling devices.

4. The method for preparing a multi-signal synchronous cable for efficient energy transmission according to claim 1, characterized in that: In the process of evacuating the pressure-maintaining cavity and pressing the pressure-maintaining piston downward to reduce the height of the cable raw material in the cavity, the preparation method further includes: Obtain the downward pressure spacing of the pressure-holding piston in the current downward pressure process, calculate the spacing difference d between the downward pressure spacing of the pressure-holding piston in the current downward pressure process and the downward pressure spacing of the pressure-holding piston in the previous downward pressure process, and calculate the discharge volume V1 according to the spacing difference d; obtain the downward pressure time t of the current downward pressure process; Calculate the suction speed E according to the quotient of the discharge volume V1 and the pressure-down time t; The pumping speed is compared with the preset qualified range. If the pumping speed is greater than the qualified range, the downward pressure speed of the pressure-maintaining piston is reduced; if the pumping speed is less than the qualified range, the downward pressure speed of the pressure-maintaining piston is increased.

5. The method for preparing a multi-signal synchronous cable for efficient energy transmission according to claim 1, characterized in that: The plasma surface treatment is performed on the cable raw material to remove pollutants on the surface of the cable raw material and introduce polar groups, and then includes: The cable raw materials are subjected to heat treatment and cooling cycle treatment, the heat treatment is a constant temperature heating treatment, and the cooling cycle treatment is a gradual cooling treatment.

6. The method for preparing a multi-signal synchronous cable for efficient energy transmission according to claim 5, characterized in that: The plasma surface treatment of the cable raw material comprises: A first plasma gas is introduced into the plasma processing chamber, and the first plasma gas is excited by a high frequency power supply; The cable raw material is fed into the plasma processing chamber and laid flat, and the preset excitation time is kept still; Introducing an inert gas into the plasma processing chamber to flush out pollutants generated by the reaction of the first plasma gas and the cable raw material; A second plasma gas is introduced into the plasma processing chamber to introduce polar groups into the cable raw material.

7. The method for preparing a multi-signal synchronous cable for efficient energy transmission according to claim 6, characterized in that: The heat treatment and cooling cycle treatment of the cable raw material includes: Put the cable raw material into the heating device, and heat the cable raw material at a constant temperature for a preset heating time. The constant temperature of the heating device is 200°C to 300°C, and the heating time is 1 to 3 hours; The cable raw materials are transferred to a ventilation cooling room, and airflow with corresponding temperature is introduced into the cable raw materials to gradually cool down the cable raw materials. The temperature of the airflow is lower than that of the cable raw materials.

8. The method for preparing a multi-signal synchronous cable for efficient energy transmission according to claim 7, characterized in that: The step of introducing airflow of corresponding temperature according to the cable raw material comprises: Get the temperature of the cable material; When the temperature of the cable raw material is higher than 150° C., a first air flow is introduced; When the temperature of the cable raw material is higher than 80° C. and lower than 150° C., a second air flow is introduced; When the temperature of the cable material is lower than 80° C., a natural airflow is introduced; wherein the temperature of the first airflow is greater than the temperature of the second airflow, and the temperature of the second airflow is greater than the temperature of the natural airflow.

9. The method for preparing a multi-signal synchronous cable for efficient energy transmission according to claim 6, characterized in that: The electrostatic separation of the cable raw materials comprises: The cable raw materials are fed into an electrostatic sorting device, and an electrostatic field is generated by the electrostatic sorting device; According to the combination state of the cable raw materials and the polar groups, they are deflected to the corresponding collection area by the electrostatic sorting equipment to obtain non-polar cable raw materials and polar cable raw materials, and foreign matter and dust particles are screened out.

10. A multi-signal synchronous cable for efficient energy transmission, characterized in that: It comprises a conductor and an insulating layer wrapped around the conductor, and the insulating layer is made by the preparation method of the multi-signal synchronous cable according to any one of claims 1 to 9.

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